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Displaying records 651 to 660 of 754 records.
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651. Temperature-Dependent Behavior of PbSc^d1/2^Nb^d1/2^O^d3^ From First Principles
Topic: Physics
Published: 7/1/2001
Authors: Eric J Cockayne, Benjamin P Burton, L Bellaiche
Abstract: We study the ferroelectric phase transition in PbSc1/2Nb1/2O3 (PSN) using a first-principles effective Hamiltonian approach. Results for PSN with NaCl-type ordering of Sc and Nb on the B sites shows that a Pb-centered effective Hamiltonian is approp ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850498

652. Testing Local Position Invariance with Four H Masers AND Four Cs Fountains
Topic: Physics
Published: 5/28/2007
Authors: Neil Ashby, Thomas Patrick Heavner, Steven R Jefferts, A Radnaev, Y Dudin
Abstract: We report the most sensitive tests to date of the assumption of local position invariance (LPI) underlying general relativity, based on a seven year comparison of cesium and hydrogen atomic clocks (frequency standards). The latest results place an up ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50569

653. Testing local position invariance with four Cesium fountain primary frequency standards and four NIST Hydrogen masers
Topic: Physics
Published: 2/16/2007
Authors: Neil Ashby, Thomas Patrick Heavner, Steven R Jefferts, Thomas Edward Parker, A Radnaev, Y Dudin
Abstract: Local Position Invariance (LPI), together with Local Lorentz Invariance (LLI) and the Weak Equivalence Principle (WEP) form the foundation of the General Theory of Relativity. LPI implies that if atomic clocks of different structures are placed toget ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50482

654. The A 2E" - X 2A2' Transition of NO^d3^ Trapped in Solid Neon
Topic: Physics
Published: 4/7/2010
Authors: Marilyn E Jacox, Warren Elwin Thompson
Abstract: NO3 has been stabilized in a neon matrix at 4.3 K in sufficient yield for detection of the absorptions between 7000 and 10000 cm-1 which arise from vibronically allowed transitions from its ground state to levels of the A 2E" state. The results conf ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903980

655. The Advanced Technology Solar Spectroscopic Imager (ATSSI) - a Novel Experiment Employing a Transition-Edge Sensor to Probe the Soft X-Ray Solar Corona
Topic: Physics
Published: 12/17/2003
Authors: P F Boerner, D S Martinez-Galarce, K Wamba, B. Cabrera, Steven Deiker, Kent D Irwin, T W Barbee, P F Baker
Abstract: The Advanced Technology Solar Spectroscopic Imager (ATSSI) is a sounding rocket-borne experiment that will employ a Transition-Edge Sensor (TES) placed at the focus of a Wolter-I mirror to study large active region loops in the solar corona. The TES ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=31452

656. The Biological Evidence Preservation Handbook: Best Practices for Evidence Handlers
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7928
Topic: Physics
Published: 4/23/2013
Authors: Susan M Ballou, Margaret C Kline, Mark David Stolorow, Melissa K Taylor, Shannan R Williams, Phylis S Bamberger, Burney Yvette, Larry Brown, Cynthia Jones, Ralph Keaton, William Kiley, Karen Lanning, Gerry LaPorte, Joseph Latta, Linda E Ledray, Randy Nagy, Linda Schwind, Stephanie Stoiloff, Brian Ostrom
Abstract: The report of the Technical Working Group on Biological Evidence Preservation offers guidance for individuals involved in the collection, examination, tracking, packaging, storing, and disposition of biological evidence. This may include crime sc ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913699

657. The Case for Cross Disciplinary Research on Time Aware Applications, Computers and Communication Systems (TAACCS)
Topic: Physics
Published: 9/18/2013
Authors: Marc A Weiss, J C Eidson, Charles Barry, L Goldin, Bob Iannucci, Edward Lee, Kevin Stanton
Abstract: A new economy built on the massive growth of endpoints on the internet will require precise and verifiable timing in ways that current systems do not support. Applications, computers and communications systems have been developed with modules and lay ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914983

658. The Cooper Pair Transistor
Topic: Physics
Published: 9/17/2010
Author: Jose Alberto Aumentado
Abstract: The Cooper pair transistor (CPT) is a superconducting electrometer that has applications in quantum information as well as fundamental superconductivity studies. Since it operates in a near-dissipationless mode, it has potential as a minimally inva ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902021

659. The Development of a Unified Time and Frequency Program in the SIM Region
Topic: Physics
Published: 9/1/2010
Authors: Michael A Lombardi, J. Mauricio Lopez-Romero
Abstract: The Sistema Interamericano de Metrologia (SIM) is one of five major regional metrology organizations (RMOs) recognized by the Bureau International des Poids et Mesures (BIPM). SIM is composed of the national metrology institutes (NMIs) located in th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906191

660. The Evolution of Time Measurement Part V: Radio Controlled Clocks
Topic: Physics
Published: 4/1/2012
Author: Michael A Lombardi
Abstract: A historical article about the origins and the development of radio controlled clocks (Part IV of a IV-part series). It describes the first time signal radio stations, the early use of telegraphic time codes, and the modern use of digital time codes. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908252



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